Journal of Industrial and Engineering Chemistry, Vol.18, No.4, 1326-1331, July, 2012
Alkylation of phenol with tert-butyl alcohol over zirconium incorporated mesoporous molecular sieves with enhanced acidity
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Several SO42-/Zr-MCM-41 and SO42-/Zr-MCM-48 solid acid catalysts were prepared by wet
impregnation method and were characterized by FT-IR, XRD, NH3-TPD and N2 physical adsorption, respectively. The catalytic activities of these catalysts were evaluated in alkylation reaction of phenol and tert-butyl alcohol. Experimental results reveal that the four solid acid catalysts still maintained a typical mesoporous framework. Under comparable condition, the SO4
2-/Zr-MCM-48-25 catalyst exhibits much high catalytic activity and gives the highest phenol conversion as compared with the other catalysts. A maximum phenol conversion of 91.6% with 81.8% selectivity to 4-tert-butylphenol (4-TBP) was achieved at the reaction temperature of 140 ℃.
Keywords:Zirconium incorporated mesoporous;molecular sieve;Solid acid catalyst;Impregnation method;Alkylation;Catalytic activity
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